From b0b9585b7d2da089ddc976ff4d4db2a8cce463b3 Mon Sep 17 00:00:00 2001 From: "E. Almqvist" Date: Tue, 15 Mar 2022 20:14:01 +0100 Subject: [PATCH] Stuff --- bootloader/bios/memory.asm | 17 ++++++++++++++++- bootloader/bootloader.asm | 3 ++- 2 files changed, 18 insertions(+), 2 deletions(-) diff --git a/bootloader/bios/memory.asm b/bootloader/bios/memory.asm index 874ca4e..9ba6e93 100644 --- a/bootloader/bios/memory.asm +++ b/bootloader/bios/memory.asm @@ -1,5 +1,20 @@ ; SRs to find memory size and leave it as a "note" for the kernel +; Descriptor Table for address ranges +addr_rng_dt_start: + addr_rng_low: dd 0 + addr_rng_high: dd 0 + addr_rng_len_low: dd 0 + addr_rng_len_high: dd 0 + addr_rng_type: dd 0 +addr_eng_dt_end: + +map_phys_mem_init: + mov ebx, 0 map_phys_mem: - int 0x15 + mov eax, 0xe820 ; Function code + mov es, + mov edx, 'SMAP' ; Signature + int BIOS_PMEM_INT + diff --git a/bootloader/bootloader.asm b/bootloader/bootloader.asm index 7e4433c..581346d 100644 --- a/bootloader/bootloader.asm +++ b/bootloader/bootloader.asm @@ -27,6 +27,7 @@ %include "bootloader/bios/convert.asm" %include "bootloader/bios/print.asm" %include "bootloader/bios/disk.asm" +%include "bootloader/bios/memory.asm" ; Protected Mode SRs %include "bootloader/equ/vga.asm" @@ -43,7 +44,7 @@ pm_preinit: lgdt [gdt_descriptor] ; Tell the CPU about the GDT mov eax, cr0 ; Set first bit of the CR0 register - or eax, 0x1 ; to 1 + or eax, 0x1 ; to 1 mov cr0, eax ; Update the control register ; Initialize PM